Materials may contribute to a depletion of natural resources.
A rate can be constituted-of-or-filled-with (soil nutrient depletion).
Fears can be constituted-of-or-filled-with (ozone depletion).
(Ozone depletion) can be constituted-of-or-filled-with some percent.
(Depletion curves) may provide an indication of an extent of (snow pack).